Sakurai

Sakurai is a family surname shared by:
 * Tomoki Sakurai, the main protagonist.
 * Tomoko Sakurai, a female alter-ego of Tomoki.
 * Tomoyo Sakurai, mother of Tomoki.
 * Tomozou Sakurai, grandfather of Tomoki.
 * Tsutsumi Sakurai, father of Tomoki.